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GROUP 1 TYPE C ✓ Verified by PartsTable
— · HOSE FITTING
WHAT YOU NEED TO KNOW
PTFE tape on tapered threads (NPT/BSPT) JIC/AN flare connections seal metal-to-metal — no tape
NPT != BSPT — look identical, NOT interchangeable
PRODUCT OVERVIEW

The ADAPTER,STRAIGHT,HOSE TO BOSS is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY OVERALL, thread_class: 3A SECOND END A, connection_type: THREADED EXTERNAL BOSS SECOND END, connection_style: GRIPPING NIPPLE (NOSE) FIRST END, nominal_thread_size: 1.188 INCHES SECOND END IN, nominal_overall_length: 2.820 INCHES IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-142-9646, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
GROUP 1 TYPE C
NSN: 4730-01-142-9646
FSC: 4730
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialNICKEL ALLOY OVERALL
thread_class3A SECOND END A
connection_typeTHREADED EXTERNAL BOSS SECOND END
connection_styleGRIPPING NIPPLE (NOSE) FIRST END
nominal_thread_size1.188 INCHES SECOND END IN
nominal_overall_length2.820 INCHES IN
thread_quantity_per_inch12 SECOND END
thread_series_designatorUN SECOND END
furnished_items_and_quantity1 HOSE SOCKET
material_document_and_classificationQQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
nominal_inside_diameter_hose_accommodated0.310 INCHES FIRST END IN
nominal_outside_diameter_hose_accommodated0.670 INCHES FIRST END IN
NSN4730-01-142-9646
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: GROUP 1 TYPE C · OEM ⚠ VERIFY BEFORE ORDERING NPT ≠ BSPT — tapered threads look identical but are NOT interchangeable. Wrong thread = leak. JIC (37°) ≠ AN (37°) ≠ SAE 45° — flare angles must match exactly. Measure thread pitch with gauge — visual identification is unreliable ✓ BROKER TIP Always use thread sealant (PTFE tape or pipe compound) on tapered threads (NPT/BSPT). JIC/AN flare fittings seal metal-to-metal — never use tape on flare connections PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
CONNECTION STYLE: EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END
•
FURNISHED ITEMS AND QUANTITY: 1 HOSE SOCKET
•
THREAD SERIES DESIGNATOR: UN SECOND END
•
CONNECTION TYPE: THREADED EXTERNAL BOSS SECOND END
•
NOMINAL OUTSIDE DIAMETER HOSE ACCOMMODATED: 0.670 INCHES FIRST END IN
•
NOMINAL INSIDE DIAMETER HOSE ACCOMMODATED: 0.310 INCHES FIRST END IN
•
NOMINAL OVERALL LENGTH: 2.820 INCHES IN
•
MATERIAL: NICKEL ALLOY OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
CONNECTION STYLEEXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END
FURNISHED ITEMS AND QUANTITY1 HOSE SOCKET
THREAD SERIES DESIGNATORUN SECOND END
CONNECTION TYPETHREADED EXTERNAL BOSS SECOND END
NOMINAL OUTSIDE DIAMETER HOSE ACCOMMODATED0.670 INCHES FIRST END IN
NOMINAL INSIDE DIAMETER HOSE ACCOMMODATED0.310 INCHES FIRST END IN
NOMINAL OVERALL LENGTH2.820 INCHES IN
MATERIALNICKEL ALLOY OVERALL
THREAD CLASS3A SECOND END A
NOMINAL THREAD SIZE1.188 INCHES SECOND END IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
4-190909 3-8 8Interchangeable
interchangeable cross-reference
interchangeable
MIL-H-24135Interchangeable
interchangeable cross-reference
interchangeable
MIL-F-24787/3 GRI TY CInterchangeable
interchangeable cross-reference
interchangeable
4-190909-1/4-6L1Interchangeable
interchangeable cross-reference
interchangeable
MIL-F-24787/3 TYPE C GROUP 1L1Interchangeable
interchangeable cross-reference
interchangeable
MIL-H-24135L1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is GROUP 1 TYPE C?
GROUP 1 TYPE C is a ADAPTER,STRAIGHT,HOSE TO BOSS.
What parts can replace GROUP 1 TYPE C?
There are 20 known substitutes for GROUP 1 TYPE C: 4-190909 3-8 8, MIL-H-24135, MIL-F-24787/3 GRI TY C and 17 more. Substitute compatibility should be verified for your specific system.
What is the NSN for GROUP 1 TYPE C?
GROUP 1 TYPE C is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-142-9646. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026